Single-Ion Conducting Polyether Electrolyte via Orthogonal Post-Polymerization Modification
발표자
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초록
내용
The substitution of organic liquid electrolytes with solid-state electrolyte has been regarded as an alternative for overcoming the safety issues of lithium-ion batteries. Among diverse solid-state electrolytes, polyether-based polymer electrolytes have been regarded as candidates for next-generation electrolytes due to their high flexibility and ion solvating ability albeit with its relatively low ionic conductivity at room temperature due to semicrystallinity. To overcome this challenge, this study presents the polyether-based single-ion conducting polymers that can orthogonally tailor various functional groups, including flexible tri(ethylene glycol) group and anionic bis(trifluoromethanesulfonyl)imide (LiTFSI) group. This strategy improves the segmental motion of single-ion conducing polymer, leading to the improvement of ionic conductivity by 500-fold at 60 °C. Upon addition of the succinonitrile plasticizer, the ionic conductivity of the resulting polymer was further enhanced due to the reduced ionic aggregates.